1 /* 2 * This program is free software; you can redistribute it and/or modify 3 * it under the terms of the GNU General Public License as published by 4 * the Free Software Foundation; either version 2 of the License, or 5 * (at your option) any later version. 6 * 7 * This program is distributed in the hope that it will be useful, 8 * but WITHOUT ANY WARRANTY; without even the implied warranty of 9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10 * GNU General Public License for more details. 11 * 12 * You should have received a copy of the GNU General Public License 13 * along with this program; if not, write to the Free Software 14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 15 */ 16 17 #include <linux/init.h> 18 #include <linux/slab.h> 19 #include <linux/ratelimit.h> 20 #include <linux/usb.h> 21 #include <linux/usb/audio.h> 22 #include <linux/usb/audio-v2.h> 23 24 #include <sound/core.h> 25 #include <sound/pcm.h> 26 #include <sound/pcm_params.h> 27 28 #include "usbaudio.h" 29 #include "card.h" 30 #include "quirks.h" 31 #include "debug.h" 32 #include "endpoint.h" 33 #include "helper.h" 34 #include "pcm.h" 35 #include "clock.h" 36 #include "power.h" 37 38 #define SUBSTREAM_FLAG_DATA_EP_STARTED 0 39 #define SUBSTREAM_FLAG_SYNC_EP_STARTED 1 40 41 /* return the estimated delay based on USB frame counters */ 42 snd_pcm_uframes_t snd_usb_pcm_delay(struct snd_usb_substream *subs, 43 unsigned int rate) 44 { 45 int current_frame_number; 46 int frame_diff; 47 int est_delay; 48 49 current_frame_number = usb_get_current_frame_number(subs->dev); 50 /* 51 * HCD implementations use different widths, use lower 8 bits. 52 * The delay will be managed up to 256ms, which is more than 53 * enough 54 */ 55 frame_diff = (current_frame_number - subs->last_frame_number) & 0xff; 56 57 /* Approximation based on number of samples per USB frame (ms), 58 some truncation for 44.1 but the estimate is good enough */ 59 est_delay = subs->last_delay - (frame_diff * rate / 1000); 60 if (est_delay < 0) 61 est_delay = 0; 62 return est_delay; 63 } 64 65 /* 66 * return the current pcm pointer. just based on the hwptr_done value. 67 */ 68 static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream) 69 { 70 struct snd_usb_substream *subs; 71 unsigned int hwptr_done; 72 73 subs = (struct snd_usb_substream *)substream->runtime->private_data; 74 spin_lock(&subs->lock); 75 hwptr_done = subs->hwptr_done; 76 substream->runtime->delay = snd_usb_pcm_delay(subs, 77 substream->runtime->rate); 78 spin_unlock(&subs->lock); 79 return hwptr_done / (substream->runtime->frame_bits >> 3); 80 } 81 82 /* 83 * find a matching audio format 84 */ 85 static struct audioformat *find_format(struct snd_usb_substream *subs, unsigned int format, 86 unsigned int rate, unsigned int channels) 87 { 88 struct list_head *p; 89 struct audioformat *found = NULL; 90 int cur_attr = 0, attr; 91 92 list_for_each(p, &subs->fmt_list) { 93 struct audioformat *fp; 94 fp = list_entry(p, struct audioformat, list); 95 if (!(fp->formats & (1uLL << format))) 96 continue; 97 if (fp->channels != channels) 98 continue; 99 if (rate < fp->rate_min || rate > fp->rate_max) 100 continue; 101 if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) { 102 unsigned int i; 103 for (i = 0; i < fp->nr_rates; i++) 104 if (fp->rate_table[i] == rate) 105 break; 106 if (i >= fp->nr_rates) 107 continue; 108 } 109 attr = fp->ep_attr & USB_ENDPOINT_SYNCTYPE; 110 if (! found) { 111 found = fp; 112 cur_attr = attr; 113 continue; 114 } 115 /* avoid async out and adaptive in if the other method 116 * supports the same format. 117 * this is a workaround for the case like 118 * M-audio audiophile USB. 119 */ 120 if (attr != cur_attr) { 121 if ((attr == USB_ENDPOINT_SYNC_ASYNC && 122 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) || 123 (attr == USB_ENDPOINT_SYNC_ADAPTIVE && 124 subs->direction == SNDRV_PCM_STREAM_CAPTURE)) 125 continue; 126 if ((cur_attr == USB_ENDPOINT_SYNC_ASYNC && 127 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) || 128 (cur_attr == USB_ENDPOINT_SYNC_ADAPTIVE && 129 subs->direction == SNDRV_PCM_STREAM_CAPTURE)) { 130 found = fp; 131 cur_attr = attr; 132 continue; 133 } 134 } 135 /* find the format with the largest max. packet size */ 136 if (fp->maxpacksize > found->maxpacksize) { 137 found = fp; 138 cur_attr = attr; 139 } 140 } 141 return found; 142 } 143 144 static int init_pitch_v1(struct snd_usb_audio *chip, int iface, 145 struct usb_host_interface *alts, 146 struct audioformat *fmt) 147 { 148 struct usb_device *dev = chip->dev; 149 unsigned int ep; 150 unsigned char data[1]; 151 int err; 152 153 ep = get_endpoint(alts, 0)->bEndpointAddress; 154 155 data[0] = 1; 156 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR, 157 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT, 158 UAC_EP_CS_ATTR_PITCH_CONTROL << 8, ep, 159 data, sizeof(data))) < 0) { 160 snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH\n", 161 dev->devnum, iface, ep); 162 return err; 163 } 164 165 return 0; 166 } 167 168 static int init_pitch_v2(struct snd_usb_audio *chip, int iface, 169 struct usb_host_interface *alts, 170 struct audioformat *fmt) 171 { 172 struct usb_device *dev = chip->dev; 173 unsigned char data[1]; 174 unsigned int ep; 175 int err; 176 177 ep = get_endpoint(alts, 0)->bEndpointAddress; 178 179 data[0] = 1; 180 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR, 181 USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_OUT, 182 UAC2_EP_CS_PITCH << 8, 0, 183 data, sizeof(data))) < 0) { 184 snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH (v2)\n", 185 dev->devnum, iface, fmt->altsetting); 186 return err; 187 } 188 189 return 0; 190 } 191 192 /* 193 * initialize the pitch control and sample rate 194 */ 195 int snd_usb_init_pitch(struct snd_usb_audio *chip, int iface, 196 struct usb_host_interface *alts, 197 struct audioformat *fmt) 198 { 199 struct usb_interface_descriptor *altsd = get_iface_desc(alts); 200 201 /* if endpoint doesn't have pitch control, bail out */ 202 if (!(fmt->attributes & UAC_EP_CS_ATTR_PITCH_CONTROL)) 203 return 0; 204 205 switch (altsd->bInterfaceProtocol) { 206 case UAC_VERSION_1: 207 default: 208 return init_pitch_v1(chip, iface, alts, fmt); 209 210 case UAC_VERSION_2: 211 return init_pitch_v2(chip, iface, alts, fmt); 212 } 213 } 214 215 static int start_endpoints(struct snd_usb_substream *subs) 216 { 217 int err; 218 219 if (!subs->data_endpoint) 220 return -EINVAL; 221 222 if (!test_and_set_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags)) { 223 struct snd_usb_endpoint *ep = subs->data_endpoint; 224 225 snd_printdd(KERN_DEBUG "Starting data EP @%p\n", ep); 226 227 ep->data_subs = subs; 228 err = snd_usb_endpoint_start(ep); 229 if (err < 0) { 230 clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags); 231 return err; 232 } 233 } 234 235 if (subs->sync_endpoint && 236 !test_and_set_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags)) { 237 struct snd_usb_endpoint *ep = subs->sync_endpoint; 238 239 snd_printdd(KERN_DEBUG "Starting sync EP @%p\n", ep); 240 241 ep->sync_slave = subs->data_endpoint; 242 err = snd_usb_endpoint_start(ep); 243 if (err < 0) { 244 clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags); 245 return err; 246 } 247 } 248 249 return 0; 250 } 251 252 static void stop_endpoints(struct snd_usb_substream *subs, 253 int force, int can_sleep, int wait) 254 { 255 if (test_and_clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags)) 256 snd_usb_endpoint_stop(subs->sync_endpoint, 257 force, can_sleep, wait); 258 259 if (test_and_clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags)) 260 snd_usb_endpoint_stop(subs->data_endpoint, 261 force, can_sleep, wait); 262 } 263 264 static int activate_endpoints(struct snd_usb_substream *subs) 265 { 266 if (subs->sync_endpoint) { 267 int ret; 268 269 ret = snd_usb_endpoint_activate(subs->sync_endpoint); 270 if (ret < 0) 271 return ret; 272 } 273 274 return snd_usb_endpoint_activate(subs->data_endpoint); 275 } 276 277 static int deactivate_endpoints(struct snd_usb_substream *subs) 278 { 279 int reta, retb; 280 281 reta = snd_usb_endpoint_deactivate(subs->sync_endpoint); 282 retb = snd_usb_endpoint_deactivate(subs->data_endpoint); 283 284 if (reta < 0) 285 return reta; 286 287 if (retb < 0) 288 return retb; 289 290 return 0; 291 } 292 293 /* 294 * find a matching format and set up the interface 295 */ 296 static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt) 297 { 298 struct usb_device *dev = subs->dev; 299 struct usb_host_interface *alts; 300 struct usb_interface_descriptor *altsd; 301 struct usb_interface *iface; 302 unsigned int ep, attr; 303 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK; 304 int err, implicit_fb = 0; 305 306 iface = usb_ifnum_to_if(dev, fmt->iface); 307 if (WARN_ON(!iface)) 308 return -EINVAL; 309 alts = &iface->altsetting[fmt->altset_idx]; 310 altsd = get_iface_desc(alts); 311 if (WARN_ON(altsd->bAlternateSetting != fmt->altsetting)) 312 return -EINVAL; 313 314 if (fmt == subs->cur_audiofmt) 315 return 0; 316 317 subs->data_endpoint = snd_usb_add_endpoint(subs->stream->chip, 318 alts, fmt->endpoint, subs->direction, 319 SND_USB_ENDPOINT_TYPE_DATA); 320 if (!subs->data_endpoint) 321 return -EINVAL; 322 323 /* we need a sync pipe in async OUT or adaptive IN mode */ 324 /* check the number of EP, since some devices have broken 325 * descriptors which fool us. if it has only one EP, 326 * assume it as adaptive-out or sync-in. 327 */ 328 attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE; 329 330 switch (subs->stream->chip->usb_id) { 331 case USB_ID(0x0763, 0x2080): /* M-Audio FastTrack Ultra */ 332 case USB_ID(0x0763, 0x2081): 333 if (is_playback) { 334 implicit_fb = 1; 335 ep = 0x81; 336 iface = usb_ifnum_to_if(dev, 2); 337 338 if (!iface || iface->num_altsetting == 0) 339 return -EINVAL; 340 341 alts = &iface->altsetting[1]; 342 goto add_sync_ep; 343 } 344 } 345 346 if (((is_playback && attr == USB_ENDPOINT_SYNC_ASYNC) || 347 (!is_playback && attr == USB_ENDPOINT_SYNC_ADAPTIVE)) && 348 altsd->bNumEndpoints >= 2) { 349 /* check sync-pipe endpoint */ 350 /* ... and check descriptor size before accessing bSynchAddress 351 because there is a version of the SB Audigy 2 NX firmware lacking 352 the audio fields in the endpoint descriptors */ 353 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 || 354 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && 355 get_endpoint(alts, 1)->bSynchAddress != 0 && 356 !implicit_fb)) { 357 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n", 358 dev->devnum, fmt->iface, fmt->altsetting); 359 return -EINVAL; 360 } 361 ep = get_endpoint(alts, 1)->bEndpointAddress; 362 if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && 363 (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) || 364 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)) || 365 ( is_playback && !implicit_fb))) { 366 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n", 367 dev->devnum, fmt->iface, fmt->altsetting); 368 return -EINVAL; 369 } 370 371 implicit_fb = (get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_USAGE_MASK) 372 == USB_ENDPOINT_USAGE_IMPLICIT_FB; 373 374 add_sync_ep: 375 subs->sync_endpoint = snd_usb_add_endpoint(subs->stream->chip, 376 alts, ep, !subs->direction, 377 implicit_fb ? 378 SND_USB_ENDPOINT_TYPE_DATA : 379 SND_USB_ENDPOINT_TYPE_SYNC); 380 if (!subs->sync_endpoint) 381 return -EINVAL; 382 383 subs->data_endpoint->sync_master = subs->sync_endpoint; 384 } 385 386 if ((err = snd_usb_init_pitch(subs->stream->chip, subs->interface, alts, fmt)) < 0) 387 return err; 388 389 subs->cur_audiofmt = fmt; 390 391 snd_usb_set_format_quirk(subs, fmt); 392 393 #if 0 394 printk(KERN_DEBUG 395 "setting done: format = %d, rate = %d..%d, channels = %d\n", 396 fmt->format, fmt->rate_min, fmt->rate_max, fmt->channels); 397 printk(KERN_DEBUG 398 " datapipe = 0x%0x, syncpipe = 0x%0x\n", 399 subs->datapipe, subs->syncpipe); 400 #endif 401 402 return 0; 403 } 404 405 /* 406 * hw_params callback 407 * 408 * allocate a buffer and set the given audio format. 409 * 410 * so far we use a physically linear buffer although packetize transfer 411 * doesn't need a continuous area. 412 * if sg buffer is supported on the later version of alsa, we'll follow 413 * that. 414 */ 415 static int snd_usb_hw_params(struct snd_pcm_substream *substream, 416 struct snd_pcm_hw_params *hw_params) 417 { 418 struct snd_usb_substream *subs = substream->runtime->private_data; 419 struct audioformat *fmt; 420 unsigned int channels, rate, format; 421 int ret, changed; 422 423 ret = snd_pcm_lib_alloc_vmalloc_buffer(substream, 424 params_buffer_bytes(hw_params)); 425 if (ret < 0) 426 return ret; 427 428 format = params_format(hw_params); 429 rate = params_rate(hw_params); 430 channels = params_channels(hw_params); 431 fmt = find_format(subs, format, rate, channels); 432 if (!fmt) { 433 snd_printd(KERN_DEBUG "cannot set format: format = %#x, rate = %d, channels = %d\n", 434 format, rate, channels); 435 return -EINVAL; 436 } 437 438 changed = subs->cur_audiofmt != fmt || 439 subs->period_bytes != params_period_bytes(hw_params) || 440 subs->cur_rate != rate; 441 if ((ret = set_format(subs, fmt)) < 0) 442 return ret; 443 444 if (subs->cur_rate != rate) { 445 struct usb_host_interface *alts; 446 struct usb_interface *iface; 447 iface = usb_ifnum_to_if(subs->dev, fmt->iface); 448 alts = &iface->altsetting[fmt->altset_idx]; 449 ret = snd_usb_init_sample_rate(subs->stream->chip, subs->interface, alts, fmt, rate); 450 if (ret < 0) 451 return ret; 452 subs->cur_rate = rate; 453 } 454 455 if (changed) { 456 mutex_lock(&subs->stream->chip->shutdown_mutex); 457 /* format changed */ 458 stop_endpoints(subs, 0, 0, 0); 459 deactivate_endpoints(subs); 460 461 ret = activate_endpoints(subs); 462 if (ret < 0) 463 goto unlock; 464 465 ret = snd_usb_endpoint_set_params(subs->data_endpoint, hw_params, fmt, 466 subs->sync_endpoint); 467 if (ret < 0) 468 goto unlock; 469 470 if (subs->sync_endpoint) 471 ret = snd_usb_endpoint_set_params(subs->sync_endpoint, 472 hw_params, fmt, NULL); 473 unlock: 474 mutex_unlock(&subs->stream->chip->shutdown_mutex); 475 } 476 477 if (ret == 0) { 478 subs->interface = fmt->iface; 479 subs->altset_idx = fmt->altset_idx; 480 } 481 482 return ret; 483 } 484 485 /* 486 * hw_free callback 487 * 488 * reset the audio format and release the buffer 489 */ 490 static int snd_usb_hw_free(struct snd_pcm_substream *substream) 491 { 492 struct snd_usb_substream *subs = substream->runtime->private_data; 493 494 subs->cur_audiofmt = NULL; 495 subs->cur_rate = 0; 496 subs->period_bytes = 0; 497 mutex_lock(&subs->stream->chip->shutdown_mutex); 498 stop_endpoints(subs, 0, 1, 1); 499 mutex_unlock(&subs->stream->chip->shutdown_mutex); 500 return snd_pcm_lib_free_vmalloc_buffer(substream); 501 } 502 503 /* 504 * prepare callback 505 * 506 * only a few subtle things... 507 */ 508 static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream) 509 { 510 struct snd_pcm_runtime *runtime = substream->runtime; 511 struct snd_usb_substream *subs = runtime->private_data; 512 513 if (! subs->cur_audiofmt) { 514 snd_printk(KERN_ERR "usbaudio: no format is specified!\n"); 515 return -ENXIO; 516 } 517 518 if (snd_BUG_ON(!subs->data_endpoint)) 519 return -EIO; 520 521 /* some unit conversions in runtime */ 522 subs->data_endpoint->maxframesize = 523 bytes_to_frames(runtime, subs->data_endpoint->maxpacksize); 524 subs->data_endpoint->curframesize = 525 bytes_to_frames(runtime, subs->data_endpoint->curpacksize); 526 527 /* reset the pointer */ 528 subs->hwptr_done = 0; 529 subs->transfer_done = 0; 530 subs->last_delay = 0; 531 subs->last_frame_number = 0; 532 runtime->delay = 0; 533 534 /* for playback, submit the URBs now; otherwise, the first hwptr_done 535 * updates for all URBs would happen at the same time when starting */ 536 if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) 537 return start_endpoints(subs); 538 539 return 0; 540 } 541 542 static struct snd_pcm_hardware snd_usb_hardware = 543 { 544 .info = SNDRV_PCM_INFO_MMAP | 545 SNDRV_PCM_INFO_MMAP_VALID | 546 SNDRV_PCM_INFO_BATCH | 547 SNDRV_PCM_INFO_INTERLEAVED | 548 SNDRV_PCM_INFO_BLOCK_TRANSFER | 549 SNDRV_PCM_INFO_PAUSE, 550 .buffer_bytes_max = 1024 * 1024, 551 .period_bytes_min = 64, 552 .period_bytes_max = 512 * 1024, 553 .periods_min = 2, 554 .periods_max = 1024, 555 }; 556 557 static int hw_check_valid_format(struct snd_usb_substream *subs, 558 struct snd_pcm_hw_params *params, 559 struct audioformat *fp) 560 { 561 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 562 struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 563 struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 564 struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME); 565 struct snd_mask check_fmts; 566 unsigned int ptime; 567 568 /* check the format */ 569 snd_mask_none(&check_fmts); 570 check_fmts.bits[0] = (u32)fp->formats; 571 check_fmts.bits[1] = (u32)(fp->formats >> 32); 572 snd_mask_intersect(&check_fmts, fmts); 573 if (snd_mask_empty(&check_fmts)) { 574 hwc_debug(" > check: no supported format %d\n", fp->format); 575 return 0; 576 } 577 /* check the channels */ 578 if (fp->channels < ct->min || fp->channels > ct->max) { 579 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max); 580 return 0; 581 } 582 /* check the rate is within the range */ 583 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) { 584 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max); 585 return 0; 586 } 587 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) { 588 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min); 589 return 0; 590 } 591 /* check whether the period time is >= the data packet interval */ 592 if (snd_usb_get_speed(subs->dev) != USB_SPEED_FULL) { 593 ptime = 125 * (1 << fp->datainterval); 594 if (ptime > pt->max || (ptime == pt->max && pt->openmax)) { 595 hwc_debug(" > check: ptime %u > max %u\n", ptime, pt->max); 596 return 0; 597 } 598 } 599 return 1; 600 } 601 602 static int hw_rule_rate(struct snd_pcm_hw_params *params, 603 struct snd_pcm_hw_rule *rule) 604 { 605 struct snd_usb_substream *subs = rule->private; 606 struct list_head *p; 607 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 608 unsigned int rmin, rmax; 609 int changed; 610 611 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max); 612 changed = 0; 613 rmin = rmax = 0; 614 list_for_each(p, &subs->fmt_list) { 615 struct audioformat *fp; 616 fp = list_entry(p, struct audioformat, list); 617 if (!hw_check_valid_format(subs, params, fp)) 618 continue; 619 if (changed++) { 620 if (rmin > fp->rate_min) 621 rmin = fp->rate_min; 622 if (rmax < fp->rate_max) 623 rmax = fp->rate_max; 624 } else { 625 rmin = fp->rate_min; 626 rmax = fp->rate_max; 627 } 628 } 629 630 if (!changed) { 631 hwc_debug(" --> get empty\n"); 632 it->empty = 1; 633 return -EINVAL; 634 } 635 636 changed = 0; 637 if (it->min < rmin) { 638 it->min = rmin; 639 it->openmin = 0; 640 changed = 1; 641 } 642 if (it->max > rmax) { 643 it->max = rmax; 644 it->openmax = 0; 645 changed = 1; 646 } 647 if (snd_interval_checkempty(it)) { 648 it->empty = 1; 649 return -EINVAL; 650 } 651 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed); 652 return changed; 653 } 654 655 656 static int hw_rule_channels(struct snd_pcm_hw_params *params, 657 struct snd_pcm_hw_rule *rule) 658 { 659 struct snd_usb_substream *subs = rule->private; 660 struct list_head *p; 661 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 662 unsigned int rmin, rmax; 663 int changed; 664 665 hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max); 666 changed = 0; 667 rmin = rmax = 0; 668 list_for_each(p, &subs->fmt_list) { 669 struct audioformat *fp; 670 fp = list_entry(p, struct audioformat, list); 671 if (!hw_check_valid_format(subs, params, fp)) 672 continue; 673 if (changed++) { 674 if (rmin > fp->channels) 675 rmin = fp->channels; 676 if (rmax < fp->channels) 677 rmax = fp->channels; 678 } else { 679 rmin = fp->channels; 680 rmax = fp->channels; 681 } 682 } 683 684 if (!changed) { 685 hwc_debug(" --> get empty\n"); 686 it->empty = 1; 687 return -EINVAL; 688 } 689 690 changed = 0; 691 if (it->min < rmin) { 692 it->min = rmin; 693 it->openmin = 0; 694 changed = 1; 695 } 696 if (it->max > rmax) { 697 it->max = rmax; 698 it->openmax = 0; 699 changed = 1; 700 } 701 if (snd_interval_checkempty(it)) { 702 it->empty = 1; 703 return -EINVAL; 704 } 705 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed); 706 return changed; 707 } 708 709 static int hw_rule_format(struct snd_pcm_hw_params *params, 710 struct snd_pcm_hw_rule *rule) 711 { 712 struct snd_usb_substream *subs = rule->private; 713 struct list_head *p; 714 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 715 u64 fbits; 716 u32 oldbits[2]; 717 int changed; 718 719 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]); 720 fbits = 0; 721 list_for_each(p, &subs->fmt_list) { 722 struct audioformat *fp; 723 fp = list_entry(p, struct audioformat, list); 724 if (!hw_check_valid_format(subs, params, fp)) 725 continue; 726 fbits |= fp->formats; 727 } 728 729 oldbits[0] = fmt->bits[0]; 730 oldbits[1] = fmt->bits[1]; 731 fmt->bits[0] &= (u32)fbits; 732 fmt->bits[1] &= (u32)(fbits >> 32); 733 if (!fmt->bits[0] && !fmt->bits[1]) { 734 hwc_debug(" --> get empty\n"); 735 return -EINVAL; 736 } 737 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]); 738 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed); 739 return changed; 740 } 741 742 static int hw_rule_period_time(struct snd_pcm_hw_params *params, 743 struct snd_pcm_hw_rule *rule) 744 { 745 struct snd_usb_substream *subs = rule->private; 746 struct audioformat *fp; 747 struct snd_interval *it; 748 unsigned char min_datainterval; 749 unsigned int pmin; 750 int changed; 751 752 it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME); 753 hwc_debug("hw_rule_period_time: (%u,%u)\n", it->min, it->max); 754 min_datainterval = 0xff; 755 list_for_each_entry(fp, &subs->fmt_list, list) { 756 if (!hw_check_valid_format(subs, params, fp)) 757 continue; 758 min_datainterval = min(min_datainterval, fp->datainterval); 759 } 760 if (min_datainterval == 0xff) { 761 hwc_debug(" --> get empty\n"); 762 it->empty = 1; 763 return -EINVAL; 764 } 765 pmin = 125 * (1 << min_datainterval); 766 changed = 0; 767 if (it->min < pmin) { 768 it->min = pmin; 769 it->openmin = 0; 770 changed = 1; 771 } 772 if (snd_interval_checkempty(it)) { 773 it->empty = 1; 774 return -EINVAL; 775 } 776 hwc_debug(" --> (%u,%u) (changed = %d)\n", it->min, it->max, changed); 777 return changed; 778 } 779 780 /* 781 * If the device supports unusual bit rates, does the request meet these? 782 */ 783 static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime, 784 struct snd_usb_substream *subs) 785 { 786 struct audioformat *fp; 787 int *rate_list; 788 int count = 0, needs_knot = 0; 789 int err; 790 791 kfree(subs->rate_list.list); 792 subs->rate_list.list = NULL; 793 794 list_for_each_entry(fp, &subs->fmt_list, list) { 795 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) 796 return 0; 797 count += fp->nr_rates; 798 if (fp->rates & SNDRV_PCM_RATE_KNOT) 799 needs_knot = 1; 800 } 801 if (!needs_knot) 802 return 0; 803 804 subs->rate_list.list = rate_list = 805 kmalloc(sizeof(int) * count, GFP_KERNEL); 806 if (!subs->rate_list.list) 807 return -ENOMEM; 808 subs->rate_list.count = count; 809 subs->rate_list.mask = 0; 810 count = 0; 811 list_for_each_entry(fp, &subs->fmt_list, list) { 812 int i; 813 for (i = 0; i < fp->nr_rates; i++) 814 rate_list[count++] = fp->rate_table[i]; 815 } 816 err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 817 &subs->rate_list); 818 if (err < 0) 819 return err; 820 821 return 0; 822 } 823 824 825 /* 826 * set up the runtime hardware information. 827 */ 828 829 static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs) 830 { 831 struct list_head *p; 832 unsigned int pt, ptmin; 833 int param_period_time_if_needed; 834 int err; 835 836 runtime->hw.formats = subs->formats; 837 838 runtime->hw.rate_min = 0x7fffffff; 839 runtime->hw.rate_max = 0; 840 runtime->hw.channels_min = 256; 841 runtime->hw.channels_max = 0; 842 runtime->hw.rates = 0; 843 ptmin = UINT_MAX; 844 /* check min/max rates and channels */ 845 list_for_each(p, &subs->fmt_list) { 846 struct audioformat *fp; 847 fp = list_entry(p, struct audioformat, list); 848 runtime->hw.rates |= fp->rates; 849 if (runtime->hw.rate_min > fp->rate_min) 850 runtime->hw.rate_min = fp->rate_min; 851 if (runtime->hw.rate_max < fp->rate_max) 852 runtime->hw.rate_max = fp->rate_max; 853 if (runtime->hw.channels_min > fp->channels) 854 runtime->hw.channels_min = fp->channels; 855 if (runtime->hw.channels_max < fp->channels) 856 runtime->hw.channels_max = fp->channels; 857 if (fp->fmt_type == UAC_FORMAT_TYPE_II && fp->frame_size > 0) { 858 /* FIXME: there might be more than one audio formats... */ 859 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max = 860 fp->frame_size; 861 } 862 pt = 125 * (1 << fp->datainterval); 863 ptmin = min(ptmin, pt); 864 } 865 err = snd_usb_autoresume(subs->stream->chip); 866 if (err < 0) 867 return err; 868 869 param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME; 870 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL) 871 /* full speed devices have fixed data packet interval */ 872 ptmin = 1000; 873 if (ptmin == 1000) 874 /* if period time doesn't go below 1 ms, no rules needed */ 875 param_period_time_if_needed = -1; 876 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 877 ptmin, UINT_MAX); 878 879 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 880 hw_rule_rate, subs, 881 SNDRV_PCM_HW_PARAM_FORMAT, 882 SNDRV_PCM_HW_PARAM_CHANNELS, 883 param_period_time_if_needed, 884 -1)) < 0) 885 goto rep_err; 886 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 887 hw_rule_channels, subs, 888 SNDRV_PCM_HW_PARAM_FORMAT, 889 SNDRV_PCM_HW_PARAM_RATE, 890 param_period_time_if_needed, 891 -1)) < 0) 892 goto rep_err; 893 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, 894 hw_rule_format, subs, 895 SNDRV_PCM_HW_PARAM_RATE, 896 SNDRV_PCM_HW_PARAM_CHANNELS, 897 param_period_time_if_needed, 898 -1)) < 0) 899 goto rep_err; 900 if (param_period_time_if_needed >= 0) { 901 err = snd_pcm_hw_rule_add(runtime, 0, 902 SNDRV_PCM_HW_PARAM_PERIOD_TIME, 903 hw_rule_period_time, subs, 904 SNDRV_PCM_HW_PARAM_FORMAT, 905 SNDRV_PCM_HW_PARAM_CHANNELS, 906 SNDRV_PCM_HW_PARAM_RATE, 907 -1); 908 if (err < 0) 909 goto rep_err; 910 } 911 if ((err = snd_usb_pcm_check_knot(runtime, subs)) < 0) 912 goto rep_err; 913 return 0; 914 915 rep_err: 916 snd_usb_autosuspend(subs->stream->chip); 917 return err; 918 } 919 920 static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction) 921 { 922 struct snd_usb_stream *as = snd_pcm_substream_chip(substream); 923 struct snd_pcm_runtime *runtime = substream->runtime; 924 struct snd_usb_substream *subs = &as->substream[direction]; 925 926 subs->interface = -1; 927 subs->altset_idx = 0; 928 runtime->hw = snd_usb_hardware; 929 runtime->private_data = subs; 930 subs->pcm_substream = substream; 931 /* runtime PM is also done there */ 932 return setup_hw_info(runtime, subs); 933 } 934 935 static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction) 936 { 937 int ret; 938 struct snd_usb_stream *as = snd_pcm_substream_chip(substream); 939 struct snd_usb_substream *subs = &as->substream[direction]; 940 941 stop_endpoints(subs, 0, 0, 0); 942 ret = deactivate_endpoints(subs); 943 subs->pcm_substream = NULL; 944 snd_usb_autosuspend(subs->stream->chip); 945 946 return ret; 947 } 948 949 /* Since a URB can handle only a single linear buffer, we must use double 950 * buffering when the data to be transferred overflows the buffer boundary. 951 * To avoid inconsistencies when updating hwptr_done, we use double buffering 952 * for all URBs. 953 */ 954 static void retire_capture_urb(struct snd_usb_substream *subs, 955 struct urb *urb) 956 { 957 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; 958 unsigned int stride, frames, bytes, oldptr; 959 int i, period_elapsed = 0; 960 unsigned long flags; 961 unsigned char *cp; 962 963 stride = runtime->frame_bits >> 3; 964 965 for (i = 0; i < urb->number_of_packets; i++) { 966 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset; 967 if (urb->iso_frame_desc[i].status && printk_ratelimit()) { 968 snd_printdd(KERN_ERR "frame %d active: %d\n", i, urb->iso_frame_desc[i].status); 969 // continue; 970 } 971 bytes = urb->iso_frame_desc[i].actual_length; 972 frames = bytes / stride; 973 if (!subs->txfr_quirk) 974 bytes = frames * stride; 975 if (bytes % (runtime->sample_bits >> 3) != 0) { 976 #ifdef CONFIG_SND_DEBUG_VERBOSE 977 int oldbytes = bytes; 978 #endif 979 bytes = frames * stride; 980 snd_printdd(KERN_ERR "Corrected urb data len. %d->%d\n", 981 oldbytes, bytes); 982 } 983 /* update the current pointer */ 984 spin_lock_irqsave(&subs->lock, flags); 985 oldptr = subs->hwptr_done; 986 subs->hwptr_done += bytes; 987 if (subs->hwptr_done >= runtime->buffer_size * stride) 988 subs->hwptr_done -= runtime->buffer_size * stride; 989 frames = (bytes + (oldptr % stride)) / stride; 990 subs->transfer_done += frames; 991 if (subs->transfer_done >= runtime->period_size) { 992 subs->transfer_done -= runtime->period_size; 993 period_elapsed = 1; 994 } 995 spin_unlock_irqrestore(&subs->lock, flags); 996 /* copy a data chunk */ 997 if (oldptr + bytes > runtime->buffer_size * stride) { 998 unsigned int bytes1 = 999 runtime->buffer_size * stride - oldptr; 1000 memcpy(runtime->dma_area + oldptr, cp, bytes1); 1001 memcpy(runtime->dma_area, cp + bytes1, bytes - bytes1); 1002 } else { 1003 memcpy(runtime->dma_area + oldptr, cp, bytes); 1004 } 1005 } 1006 1007 if (period_elapsed) 1008 snd_pcm_period_elapsed(subs->pcm_substream); 1009 } 1010 1011 static void prepare_playback_urb(struct snd_usb_substream *subs, 1012 struct urb *urb) 1013 { 1014 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; 1015 struct snd_urb_ctx *ctx = urb->context; 1016 unsigned int counts, frames, bytes; 1017 int i, stride, period_elapsed = 0; 1018 unsigned long flags; 1019 1020 stride = runtime->frame_bits >> 3; 1021 1022 frames = 0; 1023 urb->number_of_packets = 0; 1024 spin_lock_irqsave(&subs->lock, flags); 1025 for (i = 0; i < ctx->packets; i++) { 1026 counts = ctx->packet_size[i]; 1027 /* set up descriptor */ 1028 urb->iso_frame_desc[i].offset = frames * stride; 1029 urb->iso_frame_desc[i].length = counts * stride; 1030 frames += counts; 1031 urb->number_of_packets++; 1032 subs->transfer_done += counts; 1033 if (subs->transfer_done >= runtime->period_size) { 1034 subs->transfer_done -= runtime->period_size; 1035 period_elapsed = 1; 1036 if (subs->fmt_type == UAC_FORMAT_TYPE_II) { 1037 if (subs->transfer_done > 0) { 1038 /* FIXME: fill-max mode is not 1039 * supported yet */ 1040 frames -= subs->transfer_done; 1041 counts -= subs->transfer_done; 1042 urb->iso_frame_desc[i].length = 1043 counts * stride; 1044 subs->transfer_done = 0; 1045 } 1046 i++; 1047 if (i < ctx->packets) { 1048 /* add a transfer delimiter */ 1049 urb->iso_frame_desc[i].offset = 1050 frames * stride; 1051 urb->iso_frame_desc[i].length = 0; 1052 urb->number_of_packets++; 1053 } 1054 break; 1055 } 1056 } 1057 if (period_elapsed && 1058 !snd_usb_endpoint_implict_feedback_sink(subs->data_endpoint)) /* finish at the period boundary */ 1059 break; 1060 } 1061 bytes = frames * stride; 1062 if (subs->hwptr_done + bytes > runtime->buffer_size * stride) { 1063 /* err, the transferred area goes over buffer boundary. */ 1064 unsigned int bytes1 = 1065 runtime->buffer_size * stride - subs->hwptr_done; 1066 memcpy(urb->transfer_buffer, 1067 runtime->dma_area + subs->hwptr_done, bytes1); 1068 memcpy(urb->transfer_buffer + bytes1, 1069 runtime->dma_area, bytes - bytes1); 1070 } else { 1071 memcpy(urb->transfer_buffer, 1072 runtime->dma_area + subs->hwptr_done, bytes); 1073 } 1074 subs->hwptr_done += bytes; 1075 if (subs->hwptr_done >= runtime->buffer_size * stride) 1076 subs->hwptr_done -= runtime->buffer_size * stride; 1077 runtime->delay += frames; 1078 spin_unlock_irqrestore(&subs->lock, flags); 1079 urb->transfer_buffer_length = bytes; 1080 if (period_elapsed) 1081 snd_pcm_period_elapsed(subs->pcm_substream); 1082 } 1083 1084 /* 1085 * process after playback data complete 1086 * - decrease the delay count again 1087 */ 1088 static void retire_playback_urb(struct snd_usb_substream *subs, 1089 struct urb *urb) 1090 { 1091 unsigned long flags; 1092 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; 1093 int stride = runtime->frame_bits >> 3; 1094 int processed = urb->transfer_buffer_length / stride; 1095 1096 spin_lock_irqsave(&subs->lock, flags); 1097 if (processed > runtime->delay) 1098 runtime->delay = 0; 1099 else 1100 runtime->delay -= processed; 1101 spin_unlock_irqrestore(&subs->lock, flags); 1102 } 1103 1104 static int snd_usb_playback_open(struct snd_pcm_substream *substream) 1105 { 1106 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK); 1107 } 1108 1109 static int snd_usb_playback_close(struct snd_pcm_substream *substream) 1110 { 1111 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK); 1112 } 1113 1114 static int snd_usb_capture_open(struct snd_pcm_substream *substream) 1115 { 1116 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE); 1117 } 1118 1119 static int snd_usb_capture_close(struct snd_pcm_substream *substream) 1120 { 1121 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE); 1122 } 1123 1124 static int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream, 1125 int cmd) 1126 { 1127 struct snd_usb_substream *subs = substream->runtime->private_data; 1128 1129 switch (cmd) { 1130 case SNDRV_PCM_TRIGGER_START: 1131 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1132 subs->data_endpoint->prepare_data_urb = prepare_playback_urb; 1133 subs->data_endpoint->retire_data_urb = retire_playback_urb; 1134 subs->running = 1; 1135 return 0; 1136 case SNDRV_PCM_TRIGGER_STOP: 1137 stop_endpoints(subs, 0, 0, 0); 1138 subs->running = 0; 1139 return 0; 1140 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1141 subs->data_endpoint->prepare_data_urb = NULL; 1142 subs->data_endpoint->retire_data_urb = NULL; 1143 subs->running = 0; 1144 return 0; 1145 } 1146 1147 return -EINVAL; 1148 } 1149 1150 int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream, int cmd) 1151 { 1152 int err; 1153 struct snd_usb_substream *subs = substream->runtime->private_data; 1154 1155 switch (cmd) { 1156 case SNDRV_PCM_TRIGGER_START: 1157 err = start_endpoints(subs); 1158 if (err < 0) 1159 return err; 1160 1161 subs->data_endpoint->retire_data_urb = retire_capture_urb; 1162 subs->running = 1; 1163 return 0; 1164 case SNDRV_PCM_TRIGGER_STOP: 1165 stop_endpoints(subs, 0, 0, 0); 1166 subs->running = 0; 1167 return 0; 1168 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1169 subs->data_endpoint->retire_data_urb = NULL; 1170 subs->running = 0; 1171 return 0; 1172 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1173 subs->data_endpoint->retire_data_urb = retire_capture_urb; 1174 subs->running = 1; 1175 return 0; 1176 } 1177 1178 return -EINVAL; 1179 } 1180 1181 static struct snd_pcm_ops snd_usb_playback_ops = { 1182 .open = snd_usb_playback_open, 1183 .close = snd_usb_playback_close, 1184 .ioctl = snd_pcm_lib_ioctl, 1185 .hw_params = snd_usb_hw_params, 1186 .hw_free = snd_usb_hw_free, 1187 .prepare = snd_usb_pcm_prepare, 1188 .trigger = snd_usb_substream_playback_trigger, 1189 .pointer = snd_usb_pcm_pointer, 1190 .page = snd_pcm_lib_get_vmalloc_page, 1191 .mmap = snd_pcm_lib_mmap_vmalloc, 1192 }; 1193 1194 static struct snd_pcm_ops snd_usb_capture_ops = { 1195 .open = snd_usb_capture_open, 1196 .close = snd_usb_capture_close, 1197 .ioctl = snd_pcm_lib_ioctl, 1198 .hw_params = snd_usb_hw_params, 1199 .hw_free = snd_usb_hw_free, 1200 .prepare = snd_usb_pcm_prepare, 1201 .trigger = snd_usb_substream_capture_trigger, 1202 .pointer = snd_usb_pcm_pointer, 1203 .page = snd_pcm_lib_get_vmalloc_page, 1204 .mmap = snd_pcm_lib_mmap_vmalloc, 1205 }; 1206 1207 void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream) 1208 { 1209 snd_pcm_set_ops(pcm, stream, 1210 stream == SNDRV_PCM_STREAM_PLAYBACK ? 1211 &snd_usb_playback_ops : &snd_usb_capture_ops); 1212 } 1213